/*
    Gtalk is a videoconference application on the Android Platform.

    Copyright (C) 2009 by Frederic-Charles Barthelery,
                          Jean-Manuel Da Silva,
                          Nikita Kozlov,
                          Philippe Lago,
                          Jean Baptiste Vergely,
                          Vincent Veronis.

    This file is part of Gtalk.

    Gtalk is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Gtalk is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Gtalk.  If not, see <http://www.gnu.org/licenses/>.

    Please send bug reports with examples or suggestions to
    contact@Gtalk-project.com or http://dev.Gtalk-project.com/

    Epitech, hereby disclaims all copyright interest in the program "Gtalk"
    written by Frederic-Charles Barthelery,
               Jean-Manuel Da Silva,
               Nikita Kozlov,
               Philippe Lago,
               Jean Baptiste Vergely,
               Vincent Veronis.

    Nicolas Sadirac, November 26, 2009
    President of Epitech.

    Flavien Astraud, November 26, 2009
    Head of the EIP Laboratory.

 */
package org.lansir.af.gtalk.service;

import android.content.ContentResolver;
import android.content.Context;

import android.database.Cursor;

import android.net.Uri;

import org.lansir.af.gtalk.providers.AvatarProvider;
import org.lansir.af.gtalk.smack.avatar.AvatarCache;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An implementation of an AvatarCache which store the data of the filesystem.
 */
public class GtalkAvatarCache implements AvatarCache {

	private static final String TAG = GtalkAvatarCache.class.getSimpleName();

	private Context mContext;
	private ContentResolver mContentResolver;

	/**
	 * Create a GtalkAvatarCache.
	 * 
	 * @param ctx
	 *            The android context of the cache.
	 */
	public GtalkAvatarCache(final Context ctx) {
		mContext = ctx;
		mContentResolver = mContext.getContentResolver();
	}

	@Override
	public void put(String key, byte[] data) throws IOException {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		OutputStream os = new BufferedOutputStream(mContentResolver.openOutputStream(uri));
		try {
			os.write(data);
		} finally {
			os.close();
		}
	}

	@Override
	public void put(String key, InputStream in) throws IOException {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		OutputStream os = new BufferedOutputStream(mContentResolver.openOutputStream(uri));
		try {
			byte[] data = new byte[1024];
			int nbread;
			while ((nbread = in.read(data)) != -1)
				os.write(data, 0, nbread);
		} finally {
			in.close();
			os.close();
		}
	}

	@Override
	public byte[] get(String key) throws IOException {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		InputStream is = new BufferedInputStream(mContentResolver.openInputStream(uri));
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		try {
			byte[] data = new byte[1024];
			is.read(data);
			bos.write(data);
		} finally {
			is.close();
		}
		return bos.toByteArray();
	}

	@Override
	public boolean contains(String key) {
		Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
		Cursor c = mContentResolver.query(uri, null, null, null, null);
		boolean res = c.getCount() > 0;
		c.close();
		return res;
	}
}
